Sirup pump



SIRUP PUMP Filed oct. 9, 1929 A. w. LISSAUER 'ET AL Snom/woz S f7. WI loam um, f5 Tem/dye bbtoz/wm v June 21, 1932.

Patented June 21, 1932 orties ADOLPH w. LIssAUER AND sHERWooD VERMILYE, oriuisvIImE,,Kniv'rtreirYvuy SIRUP PUMP Application leidetober 9, 1,929. Serial No. 398,291. Y

Our invention relates to pumps designed to deliver a definite quantity of liquid, and the object thereof is to prevent the operator from making less than a complete or a full stroke during the operation of the pump.

' To obtain the above object', we provide the piston rod of the pump with means so that its motion cannot be reversed until the pump stroke is completed.

In the appended drawing forming a part of this application, Figure 1 is a vertical section on line 1-1, Figure 3 of a pump embodying our invention.

Figure 2 is a fragmentary similarsection showing the piston rod locking means lat the end of a downward stroke, and f Figure 3 is a cross-section on line 3 3, Figure -1.

Referring to the drawing, 5 is a tube, the lower end of which is closed by a plug 6, provided with gravity closing Vvalve 7. The upper end of the tube 5 is closed by Va head 8 having a delivery nozzle 9 in communication with the tube 5. A sleeve 10extendin'g above the head aligns with the tube 5 to form a spring housing.

A piston 11 located within the tube 5 has a Hap valve 12 controlling the apertures' in the piston through which the .liquid may pass from the lower partof the tube 5to the part above the piston. In other words, this valve 12 controls the delivery of the liquid from below the pistonll to and through the delivery nozzle 9.

A rod 13 extends from the piston 1,1- into and out of the sleeve A10, and through a spring 14 housedrtherein and an actuator 15 to which the end ofrod 13 is secured. A suitable capV is provided onthe actuator for manipulating l" the same and therefore the piston rod 13. The'tende-ncy of the spring 14 is to always move the rod and therefore the piston awayV from the plug 6 in the bottom of the tube 5.

The rod 13 at its junction with the piston 1l has a reduced portion 16, soY that a shoulder 17 is formed on the rod, the end of said reduced portion being provided with nuts or any other suitable stop 18, in consequence of which the rod 13 has an initial move- 5( n l ment or lost motion at the beginning of each lost motion of the rod 13 until the nuts 18 will stroke, as for examplewhen the actuator 15 is moved against the resistanceof the spring 14; the piston rod will move until the shoulder 17 comes intoengagement with the piston 11. Then'the two will continue to move until pressure is released on the actuator when the'spring 14 will tend to restore `the piston rod to it-s initial position, as shown in Figure 1, but there will bean initial movement or A come into engagement with the piston, when the two will move to the'position, as indicated in full lines Figure 1. I

To prevent a. partial stroke by the operator of the pump, weprovide the rod 13 with Aa pawl 19 having suitable shoulders 2() either adapted to bear against a spring 21 carried' by the'rod according to the position in which the pawl may be. lCooperating with the pawl is a circular rack r22 supported within the Y? tube V5 by screws 23.

When the actuator is moved downward by the opera-tor, the end of the pawl`19`,sefe F igure 1, will come into contact with the rack, r and as the rod descends, the pawl is caused if to turn against the resistance of the spring 21 until it takes the-position as indicated in dash and dotlines'in Figure 2. At this moment, the shoulder 17 of the rod comes into engagement with the piston. If the operator would release the actuator at'any point thereafter, the pawl 19, due to its engagement ,withA the rack, prevents the spring' 14: from restoring the rod andy therefore the piston to their original position as shown in Figure 1. p In consequence,the operator is forced to complete the stroke until the pawl'19 is. completely out of the rack 22, see Figure 2 full lines. In this position the spring is free to move the rodand therefore the piston to a their original or normal position, for the pawl 19 will turn on its pivot Whenthe rod 13 is moved by the spring,as will be seen from Figure 2, and again the initial moven mentof the rod or its lost motion is sufcient "5 to bring the pawl within the rack and therefore the operator cannot force the piston down against the resistanceof the spring until they pawl V19 is brought,to the shown in'full lines in Figure'l.

position as n m It is self evident that the'portion of the tube lenclosed between the plug 6 and thepiston 1l serves as a cylinderfor the pump, theupper part of the tube serving merely as a conduit to convey the liquid from the cylinder to the delivery nozzle. The advantage l of utilizing a large tube from the cylinder to the `nozzle is the reductionof velocity flow and therefore of resistances to iiow. The head 8 is made to lit container covers 24 from which the .pump is to extractvtliejcontents. Y ,Y l The excess movement ofthe rod 13 or its lost motion over thepiston l1 may be varied? by means of the nuts'l8 and thereby the quantity to be delivered bythe pump. Thisada valve'control aperture at;` the top thereo a rod extending-from said piston through the cover, anactuator secured to the rod, a spring on said rod interposed between the: actuator and thecover normally, tending to move the rod and piston away from the bottom of the tube, means coupling the rod Ato the cylinder to permit-the rod a longer4 stroke than'the piston, and a normally disengaged pawl andr'ack mechanism interposed between Y the rod and tube',said pawl and rack being brought into engagement by' the rodjas it consumes its excess Ymovement it has over the piston. Y y

2. In 'a full stroke sirup pump, a cylinder, a piston, suitablevalves in said vcylinder and pist-on kfor delivering liquid therefrom, a pis-v ton rod, niean'scoupling the rod to the piston toprovidejtherod with a longer stroke than the piston, .and a normally ldisengaged pawl and rack mechanism brought into engagementby'the rod as it kconsumes its excess movement it hasvover the piston. H

3. In 'a full stroke sirup pump, a cylinder,

a piston, 'suitablevalv'es in said cylinder and piston for controlling the iiow of liquid, a piston rod, means coupling the rod tov the piston-'to provide the rod with a longer stroke than'the piston and arranged'to consume the excess'of rods movementover the piston at the beginning of'each stroke, and a pawl and rack mechanism associated with the rod and Y becoming operative after the piston rod has consumedthe excess of itsmotion over that of the piston, said pawl and'rack mechanism preventing the vreversal ofthe rods movement until the completion of piston stroke.

Y 4.. In a ullstroke sirup pump, a cylinder, a piston, suitable valves insaid-cylinder and piston for controlling the flow of liquid, aV

piston rod, means coupling the rod to the piston to provide lost motion for the rod relative to the piston,ra rack, and a pawl normally disengaged from the rack and actuated by the rod to engage the rack as the rod consumes its lost motion to prevent a reversal of thepiston stroke until its completion.

5. In a full stroke sirup pump, a cylinder, a piston, suitable valves for controlling the iowof liquid, a piston rod, means coupling r the ',.rod tio .the `piston to provide lost vmotion same at the end ofpiston stroke and means 'for' engaging v the pawl to the rack operable by the rod as its lost motion is consumed,

wherebyV thefpiston stroke vis irreversible until its completion.. i

6. In a full stroke sirup pump, a cylinder,

a piston, suitable valves for controlling the flow of liquid, a piston rod, means coupling the rod to' the piston to provide therod with lost motionV relative to thepiston, a rack, a pawl for the rack carried by the rod, said pawl and rack being disengaged atftlieend-` of piston stroke, said pawl andrack engage each other through the medium-:of therod as theJ lost motion of fthe rod is consumed, whereby the movement of the piston'is rendered irreversible until the completion of piston stroke.:V A 'n 7. In a full stroke Vsirup pump,- a cylinder, a piston, suitable valve'sin said cylinder. and piston for delivering Aliquids therefrom, a

rod, means couplin the `rod to the piston toy for the rod with relationl to the piston, a Y .r-acl.,'4 a pawl for the rack disengaged from provide the rod with a longer strokethan the piston, and means for compelling a full piston ystroke brought into operation by the rod while it consumes its excess of stroke over tha-t of the piston, said rod coupling its means being arranged so that theY excess of the stroke over 'the piston is `consumed at the beginning of each stroke..

a piston,suitable valves in the cylinder and piston for controlling rthe flow 'of liquid, a

rod, means coupling the rod tothe piston to Y while'its lost motion over thepist'on is'consumed to compel a full stroke of the piston.

9. VIn a full stroke pump, a cylinder, a piston, suitable valves in said .cylinder and piston for controlling the flow of liquid, a piston rod," means coupling the rod to the piston to provide the rod with' a longer stroke'tha-nv the piston, and means for preventing a reversal of motion of said rod until the completion of pistons stroke operable bythe rodias the excess of the rods stroke over that'prof the piston is consumed.

l0. In a full stroke sirup pump, a cylinder, a piston,nsuitable valves in said cylinder and piston for controlling `the flow -of liquid,a piston rod, means coupling the rod to the V8. In aY full strokesirup pump, a cylinder, i.

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